CN115833309A - Battery charging management circuit based on patrol robot - Google Patents
Battery charging management circuit based on patrol robot Download PDFInfo
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- CN115833309A CN115833309A CN202211501333.3A CN202211501333A CN115833309A CN 115833309 A CN115833309 A CN 115833309A CN 202211501333 A CN202211501333 A CN 202211501333A CN 115833309 A CN115833309 A CN 115833309A
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Abstract
The invention provides a battery charging management circuit based on a patrol robot, which consists of a solar charging panel, an external power supply, a charging management circuit, a soft switching circuit, a charging voltage acquisition circuit, a charging current acquisition circuit, a battery temperature acquisition circuit and a main controller, wherein the external power supply is connected with the external power supply through a power supply; adjusting a charging mode by a charging management circuit according to a battery voltage signal, tracking a maximum power point of a solar charging panel and forcibly turning off a charging loop when charging abnormality is detected; when the charging voltage, the charging current and the temperature information are abnormal, the main controller generates a soft switching control signal to instruct the soft switching circuit to perform software shutdown on the charging circuit; therefore, solar charging is realized, the maximum power output is kept, the increase of the cruising time of the patrol robot outdoors is realized, the functions of hardware protection, software protection and monitoring are integrated, the safety of the battery in the using process is improved, the service life of the battery is prolonged, and the safety of a user is protected.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a battery charging management circuit based on a patrol robot.
Background
Patrol robots usually use multiple lithium batteries for power supply. The charging management circuit of the existing lithium battery comprises a power supply voltage detection module, a control module, a battery voltage detection module and a charging regulation module, wherein the control module is used for monitoring the charging process and switching the charging state. However, the existing patrol robot charging management circuit does not have solar charging, and the cruising time of the patrol robot cannot be increased outdoors; the battery does not have the functions of hardware protection, software protection and monitoring at the same time, and the safety of the battery in the use process is not high.
Disclosure of Invention
The invention provides a battery charging management circuit based on a patrol robot, which aims to solve the problems that the conventional patrol robot cannot increase the endurance time outdoors and the safety of a battery in the use process is low.
The invention is realized in such a way that a battery charging management circuit based on a patrol robot comprises:
the solar charging device comprises a solar charging panel, an external power supply charging port, a charging management circuit, a soft switching circuit, a charging voltage acquisition circuit, a charging current acquisition circuit, a battery temperature acquisition circuit and a main controller;
the solar charging panel and the external power supply charging port are respectively connected with the input end of the charging management circuit;
the soft switching circuit is connected between the output end of the charging management circuit and the anode of the battery in series, and the control end of the soft switching circuit is connected with the output end of the main controller;
the input end of the charging voltage acquisition circuit and the input end of the charging current acquisition circuit are connected between the soft switch circuit and the battery anode in a shared mode;
the output end of the charging voltage acquisition circuit, the output end of the charging current acquisition circuit and the output end of the battery temperature acquisition circuit are connected with the input end of the main controller;
the solar charging panel and the external power supply charging port are used for supplying electric energy to the battery;
the charging management circuit is used for acquiring a battery voltage signal, adjusting a charging mode according to the battery voltage signal, tracking the maximum power point of the solar charging panel and forcibly turning off the charging loop when charging abnormity is detected or the battery is fully charged in the charging process;
the charging voltage acquisition circuit, the charging current acquisition circuit and the battery temperature acquisition circuit are respectively used for acquiring charging voltage, charging current and temperature information of a battery and transmitting the charging voltage, the charging current and the temperature information of the battery to the main controller;
the main controller is used for receiving the charging voltage, the charging current and the temperature information, and generating a soft switch control signal when at least one of the charging voltage, the charging current and the temperature information is abnormal;
the soft switch circuit is used for carrying out software switching-off on the charging loop according to the soft switch control signal.
Optionally, the charge management circuit includes:
the charging management circuit comprises a charging management chip, a first switch tube, a first Schottky diode, a power inductor, a second Schottky diode, a first resistor, a first capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a light emitting diode;
the grid electrode of the first switching tube is connected with the control end DRV of the charging management chip, the source electrode of the first switching tube is connected with the solar charging panel and the output end of the external power supply charging port, and the drain electrode of the first switching tube is connected with the anode of the first Schottky diode;
the cathode of the first Schottky diode and the cathode of the second Schottky diode are connected to the first end of the first inductor, and the anode of the second Schottky diode is grounded;
a second end of the first inductor and a first end of the first resistor are connected to a positive charging current detection input end of the charging management chip, and a common junction point between the second end of the first resistor and the first end of the first capacitor is used as an output end of the charging management circuit;
the first end of the second resistor and the battery anode connecting end of the charging management chip are connected to the output end of the charging management circuit in common;
the second end of the second resistor and the first end of the third resistor are connected to the battery voltage feedback input end of the charging management chip in a shared mode, and the second end of the third resistor is grounded;
the first end of the fourth resistor, the first end of the sixth resistor and the power supply end of the charging management chip are connected to the solar charging panel and the output end of the external power supply charging port in common;
a common junction point between the second end of the fourth resistor and the first end of the fifth resistor is connected with the acquisition end of the charging management chip, and the second end of the fifth resistor is grounded;
and the second end of the sixth resistor is connected with the anode of the light-emitting diode, and the cathode of the light-emitting diode is connected with the charging state indicating end of the charging management chip.
Optionally, the soft switching circuit comprises: the second switch tube, the seventh resistor and the eighth resistor;
the first end of the eighth resistor is connected with the output end of the main controller;
the second end of the eighth resistor is connected with the first end of the seventh resistor and the grid electrode of the second switching tube;
and the source electrode of the second switching tube and the second end of the seventh resistor are connected to the output end of the charging management circuit in common, and the drain electrode of the second switching tube is connected with the anode of the battery.
Optionally, the charging voltage acquisition circuit includes a ninth resistor and a tenth resistor;
the first end of the ninth resistor is connected with the positive electrode of the battery;
a common junction point between the second end of the ninth resistor and the first end of the tenth resistor is connected with a voltage acquisition end of the main controller;
a second end of the tenth resistor is grounded.
Optionally, the charging current collecting circuit includes a hall sensor, an eleventh resistor, and a second capacitor;
the positive electrode of the Hall sensor is connected with the output end of the soft switching circuit, and the negative electrode of the Hall sensor is connected with the positive electrode of the battery;
the output end of the Hall sensor is connected with the first end of the eleventh resistor;
a common joint between the second end of the eleventh resistor and the first end of the second capacitor is connected with the current acquisition end of the main controller;
and the second end of the second capacitor is grounded.
Optionally, the battery temperature acquisition circuit comprises a twelfth resistor and a negative temperature coefficient resistor;
a first end of the twelfth resistor is connected with a power supply voltage;
a common junction point between the second end of the twelfth resistor and the first end of the negative temperature coefficient resistor is connected with a temperature acquisition end of the main controller;
and the second end of the negative temperature coefficient resistor is grounded.
Optionally, the battery charging management circuit may further include at least one reverse connection prevention current backflow prevention module;
the reverse connection prevention and current backflow prevention module comprises a Schottky diode;
the anode of the Schottky diode is connected with the output end of the solar charging panel or the external power supply charging port, and the cathode of the Schottky diode is connected with the input end of the charging management circuit;
the reverse connection preventing and current backflow preventing module is used for preventing charging current from flowing to the solar charging panel or the external power supply charging port.
Optionally, the battery charging management circuit may further include an over-voltage clamp circuit;
the overvoltage clamping circuit comprises a transient suppression diode, a third capacitor and a fourth capacitor;
the first ends of the transient suppression diode, the third capacitor and the fourth capacitor are connected between the output ends of the solar charging panel and the external power supply charging port and the input end of the charging management circuit in common;
and the second ends of the transient suppression diode, the third capacitor and the fourth capacitor are connected to the ground in common.
Optionally, the battery charge management circuit may further include a DCDC voltage reduction circuit;
the input end of the DCDC voltage reduction circuit is connected with the anode of the battery, and the output end of the DCDC voltage reduction circuit is connected with the main controller, the charging current acquisition circuit and the battery temperature acquisition circuit;
the DCDC voltage reduction circuit is used for obtaining battery voltage, and carrying out voltage reduction processing on the battery voltage to obtain voltage signals suitable for the main controller, the charging current acquisition circuit and the battery temperature acquisition circuit.
The battery charging management circuit based on the patrol robot comprises a solar charging panel, an external power supply, a charging management circuit, a soft switching circuit, a charging voltage acquisition circuit, a charging current acquisition circuit, a battery temperature acquisition circuit and a main controller, wherein the external power supply is connected with the external power supply; acquiring a battery voltage signal through the charging management circuit, adjusting a charging mode according to the battery voltage signal, tracking a maximum power point of a solar charging panel and forcibly turning off a charging loop when charging abnormality is detected in a charging process; the charging voltage, the charging current and the temperature information of the battery are respectively acquired through the charging voltage acquisition circuit, the charging current acquisition circuit and the battery temperature acquisition circuit, and a soft switch control signal is generated through the main controller when at least one of the charging voltage, the charging current and the temperature information is abnormal, so that the soft switch circuit is instructed to perform software turn-off on the charging loop; therefore, solar charging and maximum power output are realized, the cruising time of the patrol robot is increased outdoors, and the functions of hardware protection, software protection and monitoring are integrated in the charging management circuit, so that the safety of the battery in the use process is improved, the service life of the battery is prolonged, and the safety of a user is protected.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic diagram of a battery charging management circuit based on a patrol robot according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a battery charging management circuit based on a patrol robot according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a battery charging management circuit based on a patrol robot according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The battery charging management circuit based on the patrol robot comprises a solar charging panel, an external power supply, a charging management circuit, a soft switching circuit, a charging voltage acquisition circuit, a charging current acquisition circuit, a battery temperature acquisition circuit and a main controller, wherein the external power supply is connected with the external power supply; acquiring a battery voltage signal through the charging management circuit, adjusting a charging mode according to the battery voltage signal, tracking a maximum power point of a solar charging panel and forcibly turning off a charging loop when charging abnormality is detected in a charging process; the charging voltage acquisition circuit, the charging current acquisition circuit and the battery temperature acquisition circuit are used for respectively acquiring charging voltage, charging current and temperature information of a battery, and the main controller is used for generating a soft switching control signal when at least one of the charging voltage, the charging current and the temperature information is abnormal, and instructing the soft switching circuit to carry out software switching-off on the charging loop; therefore, solar charging and maximum power output are realized, the cruising time of the patrol robot is increased outdoors, hardware protection, software protection and monitoring functions are integrated in the charging management circuit, and the safety of the battery in the using process is improved.
In the embodiment of the invention, the battery charging management circuit based on the patrol robot is a PWM (pulse-width modulation) buck multi-battery charging management integrated circuit which can use a solar charging panel and an external power supply for supplying power and can be used for single or multiple lithium batteries. Fig. 1 is a schematic diagram of a battery charging management circuit based on a patrol robot according to an embodiment of the present invention. As shown in fig. 1, the patrol robot-based battery charge management circuit includes:
the solar charging device comprises a solar charging panel 10, an external power supply charging port 20, a charging management circuit 30, a soft switching circuit 40, a charging voltage acquisition circuit 50, a charging current acquisition circuit 60, a battery temperature acquisition circuit 70 and a main controller 80;
the solar charging panel 10 and the external power charging port 20 are respectively connected with the input end of the charging management circuit 30;
the soft switching circuit 40 is connected in series between the output end of the charging management circuit 30 and the positive electrode of the battery, and the control end is connected with the output end of the main controller 80;
the input end of the charging voltage acquisition circuit 50 and the input end of the charging current acquisition circuit 60 are connected between the soft switch circuit 40 and the battery anode;
the output end of the charging voltage acquisition circuit 50, the output end of the charging current acquisition circuit 60 and the output end of the battery temperature acquisition circuit 70 are connected with the input end of the main controller 80;
wherein, the solar charging panel 10 and the external power charging port 20 are used for providing power to the battery;
the charging management circuit 30 is configured to collect a battery voltage signal, adjust a charging mode according to the battery voltage signal, track a maximum power point of the solar charging panel 10, and forcibly turn off the charging loop when charging abnormality is detected or the battery is fully charged in a charging process;
the charging voltage acquisition circuit 50, the charging current acquisition circuit 60 and the battery temperature acquisition circuit 70 are respectively used for acquiring charging voltage, charging current and temperature information of a battery and sending the charging voltage, charging current and temperature information of the battery to the main controller 80;
the main controller 80 is configured to receive the charging voltage, the charging current, and the temperature information, and generate a soft switching control signal when at least one of the charging voltage, the charging current, and the temperature information is abnormal;
the soft switching circuit 40 is configured to perform software shutdown on the charging loop according to the soft switching control signal.
In the embodiment of the present invention, the solar charging panel 10 and the external power charging port 20 are both used to provide power to the battery. Wherein the solar charging panel 10 receives solar energy and converts the solar energy into electric energy. The external power charging port 20 supplies electric power by receiving commercial power. The solar charging panel 10 and the external power charging port 20 are connected in parallel and supply power independently, that is, one of the solar charging panel and the external power charging port can charge the battery independently, or the solar charging panel and the external power charging port can charge the battery together without mutual influence.
The charging management circuit 30 manages the charging process, wherein the charging management includes, but is not limited to, low voltage latching, trickle charging, constant current charging, constant voltage charging, maximum power point tracking of the solar charging panel, charging status indication, hardware current detection, and hardware turn-off function. When charging abnormity is detected in the charging process or the battery is fully charged, the charging management circuit 30 forcibly turns off the charging loop, and the hardware switch is automatically turned off, so that the hardware protection of the battery charging management circuit is realized. The hardware switch is only controlled by the hardware state of the circuit and is not controlled by software, but the software can monitor the hardware switch state.
The electrical signal coming out through the charge management circuit 30 may be provided to a battery, other on-board power supplies and peripheral units, a charge voltage acquisition circuit 50, a charge current acquisition circuit 60, and a battery temperature acquisition circuit 70.
The charging voltage acquisition circuit 50 is used for acquiring the charging voltage of the battery, the charging current acquisition circuit 60 is used for acquiring the charging current of the battery, and the battery temperature acquisition circuit 70 is used for acquiring the temperature information of the battery and sending the temperature information to the main controller 80, and the main controller 80 executes logic judgment.
The soft switching circuit 40 is controlled by the main controller 80. The main controller 80 performs logic judgment according to the charging voltage, the charging current and the temperature information, and generates a soft switching control signal when at least one of the charging voltage, the charging current and the temperature information is abnormal, so that the soft switching circuit 40 performs software shutdown on the charging loop, and software protection on the battery charging management circuit is realized.
According to the embodiment of the invention, the solar charging and maximum power point tracking functions are added in the battery charging management circuit of the prior patrol robot, so that the increase of the endurance time of the patrol robot outdoors is realized, the functions of hardware protection, software protection and monitoring are integrated in the charging management circuit, and the safety of the battery in the use process is improved.
Alternatively, as shown in fig. 2, the charging management circuit 30 includes:
the charging management circuit comprises a charging management chip 31, a first switching tube Q1, a first Schottky diode D1, a power inductor L1, a second Schottky diode D2, a first resistor R1, a first capacitor C1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a light emitting diode LED1;
the grid electrode of the first switching tube Q1 is connected with the control end DRV of the charging management chip, the source electrode is connected with the solar charging panel 10 and the output end of the external power charging port 20, and the drain electrode is connected with the anode of the first schottky diode D1;
the cathode of the first schottky diode D1 and the cathode of the second schottky diode D2 are connected to the first end of the first inductor L1, and the anode of the second schottky diode D2 is grounded;
a second end of the first inductor L1 and a first end of the first resistor R1 are commonly connected to a charging current detection positive input terminal CSP of the charging management chip, and a common junction point between the second end of the first resistor R1 and the first end of the first capacitor R1 is used as an output end of the charging management circuit 30;
a first end of the second resistor R2 and a battery positive connection terminal BAT of the charge management chip 31 are commonly connected to an output end of the charge management circuit 30;
a second end of the second resistor R2 and a first end of the third resistor R3 are commonly connected to a battery voltage feedback input terminal FB of the charge management chip 31, and a second end of the third resistor R3 is grounded;
the first end of the fourth resistor R4, the first end of the sixth resistor R6, and the power source terminal VCC of the charging management chip 31 are commonly connected to the output terminals of the solar charging panel 10 and the external power charging port 20;
a common junction point between a second end of the fourth resistor R4 and a first end of the fifth resistor R5 is connected to the acquisition terminal MPPT of the charging management chip 31, and a second end of the fifth resistor R5 is grounded;
a second end of the sixth resistor R6 is connected to the anode of the light emitting diode LED1, and a cathode of the light emitting diode LED1 is connected to the charging state indicating terminal nCHRG of the charging management chip 31.
The charging management chip 31 performs charging management on the battery, and the charging management includes a trickle charging mode, a constant current charging mode and a constant voltage charging mode. The first resistor R1 is used for detecting battery chargingElectric current, constant-current charging current I CH Set by a current sense resistor R1 between the CSP terminal of the charge management chip 31 and the battery positive connection terminal BAT, I CH =120mV/R1. The second resistor R2 and the third resistor R3 are used as feedback resistors, and the constant-voltage charging voltage V is C Set by a feedback resistor connected to the FB terminal of the charge management chip 31, V C ＝1.205*(1+R2/R3)。
In the actual charging process, when the VCC voltage of the power supply terminal of the charging management chip 31 is greater than the internal low-voltage latch threshold of 6.5V and greater than the VBAT voltage of the battery, the charging management chip 31 works normally; when the battery voltage VBAT is lower than 0.665V C Then, the charging management chip 31 automatically enters into the trickle charging mode, and the charging current is 0.175I CH . When the battery voltage VBAT is more than 0.665V C Then, the charging management chip 31 enters a constant current charging mode, and the charging current I is at this time CH Set by the 120mV reference voltage inside the charge management chip 31 and the first resistor R1 outside, i.e. I CH =120mV/R1. When the battery voltage VBAT continues to rise to approach the constant voltage charging voltage V C When the charging management chip 31 enters the constant voltage charging mode, the charging current gradually decreases. In the charging state, the drain of the nCHRG pin of the charging management chip 31 is open-circuited for output, the transistor inside the nCHRG terminal is turned on, a low level is output, and the light emitting diode LED1 is turned on to indicate the charging state. When the charging current is reduced to 0.16I CH When the charging is finished, the DRV terminal of the charging management chip 31 outputs a high level, the transistor in the nCHRG terminal is turned off, the output is in a high-impedance state, and the light emitting diode LED1 is turned on and off to indicate the charging finished state.
It should be noted that, in the charging state, the solar charging panel 10 or the external power source 20 supplies power to the battery and also supplies power to other circuits and devices; when not in a charged state, the battery powers other circuits and devices.
In the embodiment of the present invention, the first switching tube Q1, the first schottky diode D1, the power inductor L1, the second schottky diode D2, the first resistor R1, the first capacitor C1, the second resistor R2, and the third resistor R3 form a charging signal output unit, which is used for performing voltage reduction processing on the output voltages of the solar charging panel 10 and the external power charging port 20 to obtain a charging voltage VIN required by the battery, preventing the charging current of the battery from flowing backwards, and disconnecting the charging loop when receiving a forced turn-off signal. Wherein the first switching tube Q1 functions as a hard switch. When abnormality occurs in the charging process, for example, abnormality such as hardware overvoltage, undervoltage, overcurrent, overheat, etc., the charging management chip 31 generates a forced turn-off signal, automatically turns off the first switching tube Q1, and turns off the charging loop. The first Schottky diode D1 is used for preventing current from flowing backwards and preventing current of the battery from flowing to a charging port, so that the problems of power consumption increase and battery endurance reduction are solved.
The fourth resistor R4 and the fifth resistor R5 together form a maximum power point tracking unit, which is used for tracking the maximum power point of the solar charging panel 10, so that the solar charging panel 10 is in a maximum power output state at any time.
The sixth resistor R6 and the light emitting diode LED1 together form an indicator light unit for indicating the charging state of the battery. The light emitting diode LED1 is turned on in the charging state, and the light emitting diode LED1 is turned off when the charging is finished.
Alternatively, as a preferred example of the present invention, the soft switching circuit 40 includes: a second switching tube Q2, a seventh resistor R7 and an eighth resistor R8;
a first end of the eighth resistor R8 is connected to an output end of the main controller 80;
a second end of the eighth resistor R8 is connected to a first end of the seventh resistor R7 and a gate of the second switching tube Q2;
the source of the second switch Q2 and the second end of the seventh resistor R7 are commonly connected to the output end of the charge management circuit 30, and the drain of the second switch Q2 is connected to the positive electrode of the battery.
In this embodiment, the second switch tube Q2, the seventh resistor R7, and the eighth resistor R8 together form the soft switch circuit 40. The second switch tube Q2 is controlled by the main controller 80. When the second switch tube Q2 is closed, the charging loop is turned on, and the charging voltage VIN output by the charging management circuit 30 charges the battery through the second switch tube Q2. When any one or more of the charging voltage, the charging current and the temperature information of the battery is abnormal in the charging process, the main controller 80 generates a soft switching control signal; and the second switching tube Q2 closes the charging loop according to the soft switching control signal, so that the charging loop is switched off by software.
Optionally, as a preferred example of the present invention, the charging voltage collecting circuit 50 includes a ninth resistor R9, a tenth resistor R10;
a first end of the ninth resistor R9 is connected with the positive electrode of the battery;
a common junction point between the second end of the ninth resistor R9 and the first end of the tenth resistor R10 is connected to a voltage acquisition end of the main controller 80;
a second end of the tenth resistor R10 is grounded.
In this embodiment, the ninth resistor R9 and the tenth resistor R10 obtain the charging voltage of the battery through a voltage division manner, and provide the charging voltage to the main controller 80.
Optionally, as a preferred example of the present invention, the charging current collecting circuit 60 includes a hall sensor 61, an eleventh resistor R11, and a second capacitor C2;
the positive electrode of the Hall sensor 61 is connected with the output end of the soft switching circuit 40, and the negative electrode of the Hall sensor is connected with the positive electrode of the battery;
the output end of the hall sensor 61 is connected with the first end of the eleventh resistor R11;
a common junction point between the second end of the eleventh resistor R11 and the first end of the second capacitor C2 is connected to a current collecting end of the main controller 80;
the second end of the second capacitor C2 is grounded.
In this embodiment, the hall sensor 61 collects a charging current of the battery and outputs the charging current to the main controller 80. The eleventh resistor R11 and the second capacitor C2 together form an RC filter circuit, and perform filtering processing on the charging current of the battery collected by the hall sensor 61.
Optionally, as a preferred example of the present invention, the battery temperature collecting circuit 70 includes a twelfth resistor R12, a negative temperature coefficient resistor NTC;
a first end of the twelfth resistor R12 is connected with a power supply voltage;
a common junction point between the second end of the twelfth resistor R12 and the first end of the negative temperature coefficient resistor NTC is connected with a temperature acquisition end of the main controller 80;
the second end of the negative temperature coefficient resistor NTC is grounded.
Here, the twelfth resistor R12 and the negative temperature coefficient resistor NTC together constitute the battery temperature acquisition circuit 70. According to different temperature values, the negative temperature coefficient resistance NTC has different resistance values, namely different voltage drops. According to the embodiment of the invention, the negative temperature coefficient resistor NTC is close to the battery position, and the voltage on the negative temperature coefficient resistor NTC is collected, so that the corresponding battery temperature can be obtained.
The main controller 80 receives the charging voltage, the charging current and the temperature information, and performs corresponding logic judgment on the charging voltage, the charging current and the temperature information. When any one or more of the charging voltage, the charging current and the temperature information is abnormal, for example, the charging voltage is abnormal, the charging current is abnormal and the temperature information is abnormal, a soft switch control signal is generated and sent to the soft switch circuit 40, so that the second switch tube Q2 is turned off according to the soft switch control signal, the charging loop is disconnected, and the software control of the charging loop is realized.
Optionally, as a preferred example of the present invention, the main controller 80 includes a single chip U4, where pin 1 is pulled down to ground through a thirteenth resistor R13, and a BOOT program mode is set; pin 4 is a reset pin, and is pulled up to a power supply VDD _3V3 through a fourteenth resistor R14 and a capacitor R13, so that the power-on reset function of the singlechip can be realized; pin 5 is a temperature acquisition end, pin 6 is a current acquisition end, pin 7 is a voltage acquisition end, and pin 12 is a common output pin of a single chip microcomputer.
Optionally, as shown in fig. 3, as a preferred example of the present invention, on the basis of the battery charging management circuit shown in fig. 2, the battery charging management circuit may further include at least one reverse connection prevention current backflow prevention module 90;
the reverse connection prevention and current backflow prevention module 90 comprises a schottky diode D3;
the anode of the schottky diode D3 is connected to the output end of the solar charging panel 10 or the external power charging port 20, and the cathode is connected to the input end of the charging management circuit 30;
the reverse connection prevention and current backflow prevention module 90 is used for preventing the charging current from flowing to the solar charging panel 10 or the external power charging port 20.
Here, in the embodiment of the present invention, the reverse connection prevention and current backflow prevention module 90 is connected to the output end of the solar charging panel 10, and the unidirectional conductivity of the schottky diode is used, so that the current of the solar charging panel 10 does not flow to the charging port; or the reverse connection prevention current backflow prevention module 90 is connected to the output end of the external power supply charging port 20, and the current of the external power supply charging port 20 does not flow to the charging port by using the one-way conductivity of the schottky diode.
Optionally, as a preferred example of the present invention, the battery charging management circuit may further include an overvoltage clamping circuit 100;
the overvoltage clamping circuit 100 comprises a transient suppression diode D4, a third capacitor C3 and a fourth capacitor C4;
first ends of the transient suppression diode D4, the third capacitor C3 and the fourth capacitor C4 are commonly connected between the output ends of the solar charging panel 10 and the external power charging port 20 and the input end of the charging management circuit 30;
and second ends of the transient suppression diode D4, the third capacitor C3 and the fourth capacitor C4 are connected to the ground in common.
Here, the electrical signal output from the solar charging panel 10 or the external power charging port 20 may pass through the transient suppression diode D4, the third capacitor C3, and the fourth capacitor C4 to obtain a more stable electrical signal with less voltage fluctuation.
Optionally, as a preferred example of the present invention, the battery charging management circuit may further include a DCDC step-down circuit 110;
the input end of the DCDC voltage reduction circuit 110 is connected with the positive electrode of the battery, and the output end is connected with the main controller 80, the charging current acquisition circuit 60 and the battery temperature acquisition circuit 70;
the DCDC voltage reduction circuit 110 is configured to obtain a battery voltage, and perform voltage reduction processing on the battery voltage to obtain a voltage signal suitable for the main controller 80, the charging current acquisition circuit 60, and the battery temperature acquisition circuit 70.
Here, the DCDC voltage-reducing circuit is a dc-to-dc voltage-reducing circuit, and supplies power to the main controller 80, the charging current collecting circuit 60, and the battery temperature collecting circuit 70 by collecting the battery voltage VBAT and converting the voltage VBAT into a voltage signal suitable for the main controller 80, the charging current collecting circuit 60, and the battery temperature collecting circuit 70, preferably, a voltage of 3.3V. Alternatively, fig. 3 shows a specific example of the DCDC voltage reduction circuit 110.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.
Claims (9)
1. A battery charging management circuit based on a patrol robot, comprising:
the solar charging device comprises a solar charging panel, an external power supply charging port, a charging management circuit, a soft switching circuit, a charging voltage acquisition circuit, a charging current acquisition circuit, a battery temperature acquisition circuit and a main controller;
the solar charging panel and the external power supply charging port are respectively connected with the input end of the charging management circuit;
the soft switching circuit is connected between the output end of the charging management circuit and the anode of the battery in series, and the control end of the soft switching circuit is connected with the output end of the main controller;
the input end of the charging voltage acquisition circuit and the input end of the charging current acquisition circuit are connected between the soft switching circuit and the positive electrode of the battery in common;
the output end of the charging voltage acquisition circuit, the output end of the charging current acquisition circuit and the output end of the battery temperature acquisition circuit are connected with the input end of the main controller;
the solar charging panel and the external power supply charging port are used for supplying electric energy to the battery;
the charging management circuit is used for acquiring a battery voltage signal, adjusting a charging mode according to the battery voltage signal, tracking the maximum power point of the solar charging panel and forcibly turning off the charging loop when charging abnormity is detected or the battery is fully charged in the charging process;
the charging voltage acquisition circuit, the charging current acquisition circuit and the battery temperature acquisition circuit are respectively used for acquiring charging voltage, charging current and temperature information of a battery and transmitting the charging voltage, the charging current and the temperature information of the battery to the main controller;
the main controller is used for receiving the charging voltage, the charging current and the temperature information, and generating a soft switch control signal when at least one of the charging voltage, the charging current and the temperature information is abnormal;
the soft switch circuit is used for carrying out software switching-off on the charging loop according to the soft switch control signal.
2. The patrol robot-based battery charge management circuit of claim 1, wherein the charge management circuit comprises:
the charging management circuit comprises a charging management chip, a first switching tube, a first Schottky diode, a power inductor, a second Schottky diode, a first resistor, a first capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a light emitting diode;
the grid electrode of the first switching tube is connected with the control end of the charging management chip, the source electrode of the first switching tube is connected with the solar charging panel and the output end of the external power supply charging port, and the drain electrode of the first switching tube is connected with the anode of the first Schottky diode;
the cathode of the first Schottky diode and the cathode of the second Schottky diode are connected to the first end of the first inductor, and the anode of the second Schottky diode is grounded;
a second end of the first inductor and a first end of the first resistor are connected to a positive charging current detection input end of the charging management chip, and a common junction point between the second end of the first resistor and the first end of the first capacitor is used as an output end of the charging management circuit;
the first end of the second resistor and the battery anode connecting end of the charging management chip are connected to the output end of the charging management circuit in common;
the second end of the second resistor and the first end of the third resistor are connected to the battery voltage feedback input end of the charging management chip in a shared mode, and the second end of the third resistor is grounded;
the first end of the fourth resistor, the first end of the sixth resistor and the power supply end of the charging management chip are connected to the output ends of the solar charging panel and the external power supply charging port in common;
a common junction point between the second end of the fourth resistor and the first end of the fifth resistor is connected with the acquisition end of the charging management chip, and the second end of the fifth resistor is grounded;
and the second end of the sixth resistor is connected with the anode of the light-emitting diode, and the cathode of the light-emitting diode is connected with the charging state indicating end of the charging management chip.
3. The patrol robot-based battery charge management circuit of claim 1, wherein the soft switching circuit comprises: the second switch tube, the seventh resistor and the eighth resistor;
the first end of the eighth resistor is connected with the output end of the main controller;
the second end of the eighth resistor is connected with the first end of the seventh resistor and the grid electrode of the second switching tube;
and the source electrode of the second switching tube and the second end of the seventh resistor are connected to the output end of the charging management circuit in common, and the drain electrode of the second switching tube is connected with the anode of the battery.
4. A patrol robot based battery charge management circuit according to claim 3, wherein the charge voltage acquisition circuit comprises a ninth resistor, a tenth resistor;
the first end of the ninth resistor is connected with the positive electrode of the battery;
a common junction point between the second end of the ninth resistor and the first end of the tenth resistor is connected with a voltage acquisition end of the main controller;
a second end of the tenth resistor is grounded.
5. The patrol robot-based battery charge management circuit according to claim 3, wherein the charge current acquisition circuit comprises a Hall sensor, an eleventh resistor, a second capacitor;
the positive electrode of the Hall sensor is connected with the output end of the soft switching circuit, and the negative electrode of the Hall sensor is connected with the positive electrode of the battery;
the output end of the Hall sensor is connected with the first end of the eleventh resistor;
a common junction point between the second end of the eleventh resistor and the first end of the second capacitor is connected with the current acquisition end of the main controller;
and the second end of the second capacitor is grounded.
6. The patrol robot-based battery charge management circuit of claim 3, wherein the battery temperature acquisition circuit comprises a twelfth resistor, a negative temperature coefficient resistor;
a first end of the twelfth resistor is connected with a power supply voltage;
a common junction point between the second end of the twelfth resistor and the first end of the negative temperature coefficient resistor is connected with a temperature acquisition end of the main controller;
and the second end of the negative temperature coefficient resistor is grounded.
7. The patrol robot-based battery charging management circuit according to any one of claims 1 to 6, wherein the battery charging management circuit further comprises at least one anti-reverse current backflow prevention module;
the reverse connection prevention and current backflow prevention module comprises a Schottky diode;
the anode of the Schottky diode is connected with the output end of the solar charging panel or the external power supply charging port, and the cathode of the Schottky diode is connected with the input end of the charging management circuit;
the reverse connection preventing and current backflow preventing module is used for preventing charging current from flowing to the solar charging panel or the external power supply charging port.
8. A patrol robot-based battery charge management circuit according to any one of claims 1 to 6, wherein the battery charge management circuit further comprises an overvoltage clamp circuit;
the overvoltage clamping circuit comprises a transient suppression diode, a third capacitor and a fourth capacitor;
the first ends of the transient suppression diode, the third capacitor and the fourth capacitor are connected between the output ends of the solar charging panel and the external power supply charging port and the input end of the charging management circuit in common;
and the second ends of the transient suppression diode, the third capacitor and the fourth capacitor are connected to the ground in common.
9. A patrol robot-based battery charge management circuit according to any one of claims 1 to 6, wherein the battery charge management circuit may further comprise a DCDC voltage step-down circuit;
the input end of the DCDC voltage reduction circuit is connected with the anode of the battery, and the output end of the DCDC voltage reduction circuit is connected with the main controller, the charging current acquisition circuit and the battery temperature acquisition circuit;
the DCDC voltage reduction circuit is used for obtaining battery voltage, and carrying out voltage reduction processing on the battery voltage to obtain voltage signals suitable for the main controller, the charging current acquisition circuit and the battery temperature acquisition circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211501333.3A CN115833309A (en) | 2022-11-28 | 2022-11-28 | Battery charging management circuit based on patrol robot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211501333.3A CN115833309A (en) | 2022-11-28 | 2022-11-28 | Battery charging management circuit based on patrol robot |
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| CN115833309A true CN115833309A (en) | 2023-03-21 |
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| CN202211501333.3A Pending CN115833309A (en) | 2022-11-28 | 2022-11-28 | Battery charging management circuit based on patrol robot |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116873251A (en) * | 2023-07-26 | 2023-10-13 | 深圳市锐创新科技有限公司 | Charging control circuit, method and charging system |
| CN118914911A (en) * | 2024-07-19 | 2024-11-08 | 东莞市宝铼珀通讯科技有限公司 | High-voltage test fixture and test method thereof |
-
2022
- 2022-11-28 CN CN202211501333.3A patent/CN115833309A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116873251A (en) * | 2023-07-26 | 2023-10-13 | 深圳市锐创新科技有限公司 | Charging control circuit, method and charging system |
| CN118914911A (en) * | 2024-07-19 | 2024-11-08 | 东莞市宝铼珀通讯科技有限公司 | High-voltage test fixture and test method thereof |
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